Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c0b85f39ea2a98b…

MALICIOUS

PDF

74.3 KB Created: 2021-07-16 05:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 554f514dc66261f1da892b61b94fdfcc SHA-1: a97af3de6a8c9f0e57f4f48434cbcf5191ac513f SHA-256: 9c0b85f39ea2a98bc803b68fe848a090c61c66f300d1c3dea2534f980bd0c4d9
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as a phishing trojan. While no executable scripts were found, the presence of embedded URLs and the PDF structure suggest it is designed to redirect users to malicious content or facilitate further compromise. The file's metadata indicates it was generated by wkhtmltopdf, a tool sometimes used to create malicious documents.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2592

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://feedproxy.google.com/~r/sq/ugae/~3/jEScUJLm1bs/square?utm_term=is+density+an+intensive+physical+property
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec7996e64ce5371633c714/1626110359158/15436235070.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee63d07c5bce1f334f7921/1626235857086/vadenarizizigozop.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c415.bin
6394dcba09b916bca7a34af4e0e411bafa29cac876c0b93c9fb433b93c2b37ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC415 15884 bytes
font_01_sfnt_off0000ecc8.bin
00e1b6323b9080b34ee34fe6432031b09b83906e3f87d0a0dfeedb93425c76c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC8 10744 bytes
font_02_sfnt_off00010571.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10571 16792 bytes

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